First, you marked 'Dokdo' and 'East Sea' as 'Takeshima' and 'Japan Sea' on the map. Used the name of a country named Japan has officially began when the 8th century. But the East Sea has been Korea's territory since the 6th century, when Dokdo was found. East Sea is used more than 700 years earlier than the name of Japan . Therefore, the name or 'East Sea' has historical legitimacy compared to the name of 'Sea of Japan'.

     Secondly, you said, historically, Takeshima has been part of Japan, consistently recognized by the national government. So far, the Republic of Korea, since the Joseon Dynasty, Dokdo belongs to the uljinhyeon of the local metropolitan Samcheok, Gangwon Province, the land registry. There are many historical documents and maps that prove this. You can also find out from the Paldo Chongdo in 1481 and Daedongyeojido in 1861. Thus, Dokdo is our country, of course, the land of the Republic of Korea. 

     Finally,  you insisted that Takeshima was incorporated into Shimane Prefecture in 1905 and it was seized by South Korea after the war.  However, Japan invaded Dokdo after the Korean War and left a mark of the territory of Japan. Then it's like you, they say false claim that Dokdo is Japan's territory. 

     If you recorrect these, your website will be able to inform people more accurate information. The people of your country, Japan, also have the right to know the proper history. Learning shameful history is also important. I hope that Japan will become a more mature country where it can teach the right facts, recognize history, and reflect on itself.